/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Sets an internal state when an emitter was pinned/unpinned in the stack UI
void SetEmitterPinnedState ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FNiagaraEmitterHandleViewModel](API\Plugins\NiagaraEditor\ViewModels\FNiagaraEmitterHandleViewModel) > EmitterHandleModel, bool bPinnedState )